* Joe Wong <joewon...@gmail.com>:
> Yes, on the same machine.
> 
> The reason I want to do this is I have sender_dependent_relay_host map
> defined, it didn't work with null email sender "<>".  I want to
> forward all by bounce to another host for some processing first, so
> have the idea of creating this 'bounce' postfix instance. Any thought?

Simply set the envelope sender to a domain/hostname which ends up on
the other host.

That's it.

-- 
Ralf Hildebrandt
  Geschäftsbereich IT | Abteilung Netzwerk
  Charité - Universitätsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  ralf.hildebra...@charite.de | http://www.charite.de
            

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